Update: Test alert from Monterey Park accidentally sent to all of LA County

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A test emergency alert from Monterey Park's Emergency Operations Center was accidentally sent to mobile devices across Los Angeles County Wednesday afternoon, according to David Sommers, a spokesman for L.A. County Board of Supervisors.

The wireless emergency alert is part of FEMA's Integrated Public Alert & Warning System, which requires a monthly internal test, a FEMA spokesperson told KPCC, though that test didn't remain internal.

The new 2,000 sq. ft. facility will also be used for training and emergency exercises.
Besides having state of the art communications equipment, the facility is powered by a 100 kilowatt back-up generator and supplies to support a staff in an emergency situation.

KPCC has reached out to the city of Monterey Park but was unable to obtain details before this was published.